They look like Hygrocybes, with the thick gills, except those wouldn’t be on wood, or usually gregarious like that. On wood it could be Xeromphalina, but that should have a darker, fairly stiff stipe, and more decurrent gills. There is also Chrysomphalina aurantiaca which will grow gregarious on wood, and has soft wide spaced gills, orange colors, this one is usually soft all over, with a soft light colored stipe.